Get a mystery box full of miniatures and/or terrain pieces from Mystic Pigeon Gaming every month.

You have two options, a fantasy themed box, or a Sci Fi themed box. The fantasy option is a great choice for building up your collection of minis and terrain suitable for Dungeons and Dragons, Pathfinder and similar tabletop games.  The Sci Fi box contains minis and terrain compatible with Warhammer 40k, Starfinder and similar space themed tabletop/wargames.